Remove deprecated string features.

sdk/lib/io/http_impl.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 // The close queue handles graceful closing of HTTP connections. When
 // a connection is added to the queue it will enter a wait state
 // waiting for all data written and possibly socket shutdown from
 // peer.
@@ skipping 567 matching lines @@
   bool _writeHeader() {
     List<int> data;
 
     // Write status line.
     if (_protocolVersion == "1.1") {
       _httpConnection._write(_Const.HTTP11);
     } else {
       _httpConnection._write(_Const.HTTP10);
     }
     _writeSP();
-    data = _statusCode.toString().charCodes;
+    data = _statusCode.toString().codeUnits;
     _httpConnection._write(data);
     _writeSP();
-    data = reasonPhrase.charCodes;
+    data = reasonPhrase.codeUnits;
     _httpConnection._write(data);
     _writeCRLF();
 
     var session = _httpConnection._request._session;
     if (session != null && !session._destroyed) {
       // Make sure we only send the current session id.
       bool found = false;
       for (int i = 0; i < cookies.length; i++) {
         if (cookies[i].name.toUpperCase() == _DART_SESSION_ID) {
           cookies[i].value = session.id;
@@ skipping 626 matching lines @@
   }
 
   void _streamSetErrorHandler(callback(e)) {
     _streamErrorHandler = callback;
   }
 
   void _writeHeader() {
     List<int> data;
 
     // Write request line.
-    data = _method.toString().charCodes;
+    data = _method.toString().codeUnits;
     _httpConnection._write(data);
     _writeSP();
     // Send the path for direct connections and the whole URL for
     // proxy connections.
     if (!_connection._usingProxy) {
       String path = _uri.path;
       if (path.length == 0) path = "/";
       if (_uri.query != "") {
         if (_uri.fragment != "") {
           path = "${path}?${_uri.query}#${_uri.fragment}";
         } else {
           path = "${path}?${_uri.query}";
         }
       }
-      data = path.charCodes;
+      data = path.codeUnits;
     } else {
-      data = _uri.toString().charCodes;
+      data = _uri.toString().codeUnits;
     }
     _httpConnection._write(data);
     _writeSP();
     _httpConnection._write(_Const.HTTP11);
     _writeCRLF();
 
     // Add the cookies to the headers.
     if (_cookies != null) {
       StringBuffer sb = new StringBuffer();
       for (int i = 0; i < _cookies.length; i++) {
@@ skipping 1064 matching lines @@
 
 
 class _RedirectInfo implements RedirectInfo {
   const _RedirectInfo(int this.statusCode,
                       String this.method,
                       Uri this.location);
   final int statusCode;
   final String method;
   final Uri location;
 }